Hardcore way of using "classic" version of hdevtools with stack.
First build and install the "classic" version of hdevtools, using stack:
$ cd /tmp
$ git clone --depth 1 https://github.com/bitc/hdevtools.git
$ cd hdevtools
# Modify the flags in the following line to use the same settings you use in your project:
$ stack --install-ghc --no-system-ghc --resolver lts-7.1 init
$ stack install
Now you should have an hdevtools executable in ~/.local/bin/hdevtools.
Copy it to somewhere in you $PATH or verify that the directory is already in your $PATH.
Lookup up stack's snapshot-pkg-db path:
$ stack path --install-ghc --no-system-ghc --resolver lts-7.1 --snapshot-pkg-db
/home/bitc/.stack/snapshots/x86_64-linux/lts-7.1/8.0.1/pkgdb
The above path is what you use for GHC's -package-db option.
You also will need to specifiy GHC's -package-id option for each package(haskell library) that you will be using.
To check which packages you have installed:
$ ls -1 /home/bitc/.stack/snapshots/x86_64-linux/lts-7.1/8.0.1/pkgdb
cmdargs-0.10.14-8WOlFWoK1XlCebTZE2edgd.conf
extra-1.4.10-2LEZ2hBhlUuEhqffYmrH30.conf
ghc-paths-0.1.0.9-GIOnKzk0HmEBZ77Q1HsThK.conf
hashable-1.2.4.0-EMu4H7FB10MAl6hwKw992G.conf
js-flot-0.8.3-DwW7tRfA2DS2odTaEQO7re.conf
js-jquery-3.1.0-FhGyG2QmJFC9cqB7DILb9n.conf
network-2.6.3.1-G4Up1CPKbp7DeFsnywOnGG.conf
package.cache
primitive-0.6.1.0-Ip44DqhfCp21tTUYbecwa.conf
random-1.1-54KmMHXjttlERYcr1mvsAe.conf
shake-0.15.10-GcLMYwHJl6F2fOZ4KrIiXZ.conf
syb-0.6-C65vWCsht6A8uLstpQIXyj.conf
text-1.2.2.1-5QpmrLQApEZ4Ly9nMHWY0s.conf
unordered-containers-0.2.7.1-Eo9jd5DMz45DhBLCG8skzW.conf
utf8-string-1.0.1.1-2T8mBCuEDlXDo8zed8Onw4.conf
The -package-id that you use is one of the above filenames, but without the ".conf" extension.
Example of invoking hdevtools on the file "Build.hs", which uses packages "text" and "shake":
$ hdevtools check -g-package-db -g/home/bitc/.stack/snapshots/x86_64-linux/lts-7.1/8.0.1/pkgdb -g-package-id -gtext-1.2.2.1-5QpmrLQApEZ4Ly9nMHWY0s -g-package-id -gshake-0.15.10-GcLMYwHJl6F2fOZ4KrIiXZ Build.hs
Good luck!